Quality British made Captain Fields pattern parallel rules. Precision injected moulded in 5mm acrylic, with divisions for the protractor and compass points, giving greater accuracy.
Bevelled on all 4 edges for ease of use.
RWB434 Standard. 400mm (16") length with anodised aluminium link arms. RWB431 Deluxe. 400mm (16") length with solid brass link arms.